With weather patterns changing in unexpected ways, premium winemakers, where vintage matters, are at risk of sub-par years. Mass-market winemakers have a more consistent product year-to-year and are less influenced by global warming.   

The Brunello di Montalcino Consorzio rates each vintage from one to five stars. In the 1950s, there was one five-star vintage; the 1960s and 1970s each saw two such years. But since 2010, they’ve already seen three five-star vintages, with this year’s harvest yet to be evaluated. The last two-star vintage was 2002; the last one-star, 1984. Quality has become more consistent; the danger in the future may be over-ripeness instead.